◍ Black Hole
〜 QNM
≈ Waves
◎ Binary
☰ controls
◍ QNM continued fraction
Spacetime
Schwarzschild
Kerr (radial, fixed A)
Taub-NUT
Multipole ℓ
2
Field (perturbation spin)
scalar (s=0)
electromagnetic (s=1)
gravitational (s=2) — the LIGO ringdown
NUT charge l
1.00
Casimir C = q(q+1)
6
Spin a
0.20
Azimuthal m
0
Separation A
6.0
Depth (terms)
70
drag / 1-finger = pan · wheel / pinch = zoom ·
click / tap a well = snap
axes: x = ω
r
, y = −ω
i
(damping)
ω = —
mode
—
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